Optimisation, questions !

Hello everyone ! ;-)

After modding aix2 with really nice result, I look after optimisation because i've got lot of drop framerate


I've got an i7 4790k overcloked to 4.5ghz, so i can't do better on hardware..
16 gb of ram
Gtx 1060
SSD NMVE


So i start to decrease somes effects, like smoke, explosions and others.. but still have somes drop framerate

So what affects performances ? I know that every pixel has an impact, but I wanted to know which consumes the most ?

Draw Distance have an effect but i don't want to decrease it now (600m)

High Textures have an effect?

I use lot of sounds and distant sounds, they have an effect of performance ?

I use only 48 bots


Thank you for your knowledge :)